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Full text of "Text Book Of Mechanical Engineering"

Appendix II.

between discs A and B by the force of a screwed-up spring H, the
amount of pressure being measured by pointer H, and the bolt F
having a spherical seat. Both discs being connected by keys K K,

are revolved by belting, and the friction between the two surfaces
is measured by weight E, in the manner of a dynamometer (see
also p. 558). In marine practice pressures of 50 Ibs. per sq. in.
are allowed on thrust-block collars, and the H.P, transmitted to